Year	Percent change
1980	2.898
1981	2.512
1982	1.495
1983	-0.729
1984	3.204
1985	1.947
1986	0.424
1987	3.641
1988	2.998
1989	5.614
1990	7.711
1991	1.642
1992	3.579
1993	2.314
1994	5.894
1995	9.593
1996	9.092
1997	10.747
1998	8.649
1999	10.515
2000	9.479
2001	5.348
2002	5.954
2003	2.98
2004	6.636
2005	5.68
2006	5.05
2007	5.261
2008	-4.405
2009	-5.054
2010	1.879
2011	3.677
2012	0.193
2013	1.338
2014	8.75
2015	25.01
2016	4.904
2017	7.208
2018	6.813
2019	4.147
2020	3.448
2021	3.125
2022	2.869
2023	2.671
2024	2.712